Technical Data
ARFBP1 (HUWE1. HECT, UBA and WWE domain containing 1, ARF-binding protein 1, ARF-BP1, E3 ubiquitin-protein ligase HUWE1, HECT, UBA and WWE domain-containing protein 1, HectH9, HECTH9, Homologous to E6AP carboxyl terminus homologous protein 9, HSPC272, Ib7
The ARF tumor suppressor is a critical regulator of p53 stability (reviewed in 1). In addition to p53, ARF1 binds to other proteins such as MDM2 (2) and ARF-BP1, a large protein containing HECT, UBA and WWE motifs (3). ARFBP1 directly binds and ubiquitinates p53; this activity is
inhibited by ARF, indicating that ARF-BP1 is a critical mediator of the p53-dependent and p53-independent tumor suppressor functions of ARF. ARF-BP1 can also catalyze the polyubiquitination of Mcl-1, an anti-apoptotic Bcl-2 family member involved in DNA damage-induced apoptosis. Elimination of ARF-BP1 expression by RNA interference stabilized Mcl-1 protein, resulting in an attenuation of apoptosis induced by DNA-damage agents (4).

Suitable for use in ELISA, Western Blot and Immunocytochemistry. Other applications not tested.

Recommended Dilution:
Western Blot: 1-2ug/ml
Immunocytochemistry: 5ug/ml
Optimal dilutions to be determined by the researcher.

Positive Control:
Daudi cell lysate

Storage and Stability:
May be stored at 4C for short-term only. Aliquot to avoid repeated freezing and thawing. Store at -20C. Aliquots are stable for at least 12 months. For maximum recovery of product, centrifuge the original vial after thawing and prior to removing the cap.
PabIgGAffinity Purified
100ug-20CBlue IceHumanRabbit
19 amino acid peptide from near the carboxy terminus of human ARF-BP1 (GenBank accession no. NP_113584).
Purified by immunoaffinity chromatography.
Supplied as a liquid in PBS, 0.02% sodium azide.
Recognizes human ARF-BP1. Species Crossreactivity: mouse and rat.
Intended for research use only. Not for use in human, therapeutic, or diagnostic applications.
1. Gallagher SJ, Kefford RF and Rizos H. The ARF tumour suppressor. Int. J. Biochem. Cell Biol. 2006; 38:1637-41. 2. Pomerantz J, Schreiber-Agus N, Leigeois NJ, et al. The Ink4a tumor suppressor gene product, p19ARF interacts with MDM2 and neutralizes MDM2s inhibition of p53. Cell 1998; 92:725-34. 3. Chen D, Kon N, Li M, et al. ARF-BP1/Mule is a critical mediator of the ARF tumor suppressor. Cell 2005; 121:1071-83. 4. Zhong Q, Gao W, Du F, et al. Mule/ARF-BP1, a BH3-only E3 ubiquitin ligase, catalyzes the polyubiquitination of Mcl-1 and regulates apoptosis. Cell 2005; 121:1085-95.